Research and implementation of Viterbi decoding in TD-LTE system

The Viterbi algorithms of the tail biting convolutional code in TD-LTE system is introduced. Aiming at the decoding commons for the convolutional codes of TD-LTE system, this paper presents an implementation program of Viterbi decoding algorithm based on the soft-decision, and validates the algorithm by means of FPGA in the Xinlinx's XC5VSX95T chip, the program simplifies some decoding operations. The simulation result shows that the program has a good feasibility and can meet the decoding requirements.